43 C.F.R. § 3107.5-2 Undeveloped parts of leases in their extended term.
Title 43 - Public Lands: Interior
Undeveloped parts of leases retained or assigned out of leases which are in their extended term shall continue in effect for 2 years after the effective date of assignment, provided the parent lease was issued prior to September 2, 1960.
Title 43: Public Lands: Interior
PART 3100—OIL AND GAS LEASING
Subpart 3107—Continuation, Extension or Renewal
§ 3107.5-2 Undeveloped parts of leases in their extended term.

